Fixx was a member of the high-IQ club,
Mensa, and published three collections of puzzles:
Games for the Super-Intelligent,
More Games for the Super-Intelligent, and
Solve It! The back flap of his first book says: "... He spent his time running on the roads and trails near his home, training for the
Boston Marathon." Fixx started running in 1967 at age 35. At that time, he weighed 214 pounds (97 kg) and smoked two packs of cigarettes per day. Ten years later, when his book,
The Complete Book of Running (which spent 11 weeks at number one on
The New York Times Best Seller list) was published, he was 60 pounds (27 kg) lighter and smoke-free. In his books and on television talk shows, he extolled the benefits of physical exercise and how it considerably increased the average life expectancy. The cover of his book
The Complete Book of Running featured Fixx's muscular legs against a red cover. The book sold over a million copies. In 1980, Fixx wrote a follow-up book titled ''Jim Fixx's Second Book of Running: The Companion Volume to The Complete Book of Running
. In 1982, Fixx published Jackpot!
, the story of what happened after the publication of The Complete Book of Running'' when he experienced the "Great American Fame Machine", becoming richer and more celebrated than he could have imagined. ==Death==